May 2020
Intermediate to advanced
456 pages
9h 13m
Japanese
Content preview from ゼロからはじめるデータサイエンス 第2版 ―Pythonで学ぶ基本と実践
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23.3
ユーザベース協調フィルタリング
■
355
ユーザ
1
ならば、すでに次の分野には興味を持っています。
["NoSQL", "MongoDB", "Cassandra", "HBase", "Postgres"]
したがってお勧めは、次のようになります。
[('Python', 4), ('R', 4), ('Java', 3), ('regression', 3), ('statistics', 3)]
ユーザ
3
は、すでに多くの興味を持っているので、お勧めは次のようになります。
[('Java', 3), ('HBase', 3), ('Big Data', 3),
('neural networks', 2), ('Hadoop', 2)]
「誰もが
Python
に興味を持っているので、あなたもきっと
Python
に興味を持つで
しょう」は、あまり説得力があるとは言えません。ユーザがデータサイエンス・スター
の新規ユーザであり、我々がそのことを全く知らないのであれば、それが最善なのか
もしれません。個々のユーザの興味に従って、より良いお勧めを出すために何ができ
るかを、考えてみましょう。
23.3
ユーザベース協調フィルタリング
ユーザの興味を掴む方法の
1
つは、まず着目するユーザと似た傾向を持つユーザ群
を探し、それらユーザ群の興味を提示することです。
そのためにユーザ傾向の類似性を測る方法が必要となります。ここでは「21章 自
然言語処理」で
2
つのワードベクトルの類似度を測定するのに使用したコサイン ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.